US3697711A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Snap action switch
Assignee: Unisys Corp
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Filing: 1971-06-29
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Granted: 1972-10-10
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Expires: 1991-06-29
Abstract
Abstract An electromechanical switch that includes an electrically conductive sheet having a spring-like pattern of apertures therethrough, a printed circuit electrical conductor and an apertured insulating spacer therebetween for permitting the center portion of the pattern to make electrical contact therewith when the pattern is forced out of the plane of the conductive sheet by an actuatable plunger.
Inventors
- 👤 Elton E Tetrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 01:52
CPC Classifications
H; H01; H01H; H01H13/00; H01H13/70; H01H13/78; H01H13/785; H01H13/02; H01H13/26; H01H13/48; H01H13/702; H01H2201/00; H01H2201/022; H01H2201/026; H01H2205/00; H01H2205/032; H01H2215/00; H01H2215/03; H01H2215/034; H01H2215/04; H01H2221/00; H01H2221/024; H01H2227/00; H01H2227/002; H01H2227/018; H01H2229/00; H01H2229/016
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
184 words
A keyswitch comprising: a key having a plunger coupled thereto; chassis means for supporting said plunger in an actuatable manner; a first conductive planar sheet member having a planar springlike pattern formed therein, said pattern comprising a plurality of concentric pairs of appertures therethrough with adjacent pairs of apertures having increasing radii from a common center portion, the apertures of each pair being circular arcs of equal radii and less than 180* but greater than 90* wherein alternate pairs of apertures are rotated approximately 90* with respect to each other about said common center portion which is defined by the innermost pair of apertures; spacer means arranging said common portion in compressive contact with said plunger for maintaining said plunger in an unactuated condition; a second conductive member oriented below said common center portion; an electrically insulating member for normally separating said second conductive member and said common center portion but permitting said common center portion to make electrical contact with said second conductive member when said common center portion is forced through the plane of said electrically insulating member by said actuated plunger.
Claim 2
Dependent Claim
184 words
A keyswitch comprising: a key having a plunger coupled thereto; chassis means for supporting said plunger in an actuatable manner; a first conductive planar sheet member having a planar springlike pattern formed therein, said pattern comprising a plurality of concentric pairs of appertures therethrough with adjacent pairs of apertures having increasing radii from a common center portion, the apertures of each pair being circular arcs of equal radii and less than 180* but greater than 90* wherein alternate pairs of apertures are rotated approximately 90* with respect to each other about said common center portion which is defined by the innermost pair of apertures; spacer means arranging said common portion in compressive contact with said plunger for maintaining said plunger in an unactuated condition; a second conductive member oriented below said common center portion; an electrically insulating member for normally separating said second conductive member and said common center portion but permitting said common center portion to make electrical contact with said second conductive member when said common center portion is forced through the plane of said electrically insulating member by said actuated plunger.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-10-10 | 1976-04-10 | 1976-10-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-10 | 1980-04-10 | 1980-10-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-10 | 1984-04-10 | 1984-10-10 | $7700.00 | Window Closed / Lapsed |